gemfile cleanup

rename testing group to test, to skip on heroku
move coveralls to test group
Added keyboard shortcut to add-feed

* Used the BIG_FREE_READER shortcut of 'a' to add-feed.
* I only added the en.yml localization.
* I didn't see any tests for shortcuts, so didn't add one.
Updated keyboard shortcuts screenshot
Merge pull request #201 from queuebit/master

Add 'a' keyboard shortcut to add-feed
update translations
fix es.yml
Prevent n+1 queries when serializing stories to json
Merge pull request #202 from ejfinneran/perf-fix

Prevent n+1 queries when serializing stories to json
Added debug page with Ruby version
Added user agent to debug
Added queued job count to debug
Fixed typo
update translations
add failing test case to reproduce #203
gsub out <wbr> tags
Handle rspec LoadError when bundle-ing without dev/test
Merge branch 'pr/199'
css: Display story img as it is

In story, imgs may be inline or floating, so it seems better not to set
any css for them.

`clear: both` is also added at `.story-actions-container` to prevent
floating img out of content area.
Added migration status to debug page
Use constructor injection to avoid stubbing ActiveRecord::Migrator